Login Control Error

Question

hi i m using login control for the first time i got the following error.plz anyone help me to solve the error '_Default.SiteLevelCustomAuthenticationMethod(string, string)': not all code paths return a value private bool SiteLevelCustomAuthenticationMethod(string UserName, string Password) { bool boolReturnValue = false; string strConnection = "server=Laby/Laby;database=cfintranet;uid=sa;pwd=;"; SqlConnection Connection = new SqlConnection(strConnection); String strSQL = "Select * From user"; SqlCommand command = new SqlCommand(strSQL, Connection); SqlDataReader Dr; Connection.Open(); Dr = command.ExecuteReader(); while (Dr.Read()) { if ((UserName == Dr["name"].ToString()) & (Password == Dr["Password"].ToString())) { boolReturnValue = true; } Dr.Close(); return boolReturnValue; } }